Among the major U.S. carriers, AT&T's activation rates for the two new phones have been the highest at 0.67 percent of all iPhones. Verizon Wireless came in second with 0.51 percent, followed by Sprint with 0.12 percent and T-Mobile with just 0.07 percent.

Localytics

The 5S is also the top dog in all launch countries combined, according to Localytics, outshining the 5C by a factor of 3.7. In Japan alone, the 5S is outshining the 5C by a factor of 5. The US has accounted for most of the activations so far, more than twice as many as those in all other markets combined.

About the author

Journalist, software trainer, and Web developer Lance Whitney writes columns and reviews for CNET, Computer Shopper, Microsoft TechNet, and other technology sites. His first book, "Windows 8 Five Minutes at a Time," was published by Wiley & Sons in November 2012.
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